<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Copyright (C) 1999-2023 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with the
Invariant Sections being "Funding Free Software", the Front-Cover
Texts being (a) (see below), and with the Back-Cover Texts being (b)
(see below).  A copy of the license is included in the section entitled
"GNU Free Documentation License".

(a) The FSF's Front-Cover Text is:

A GNU Manual

(b) The FSF's Back-Cover Text is:

You have freedom to copy and modify this GNU Manual, like GNU
     software.  Copies published by the Free Software Foundation raise
     funds for GNU development. -->
<!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Compiler Characteristics (The GNU Fortran Compiler)</title>

<meta name="description" content="Compiler Characteristics (The GNU Fortran Compiler)">
<meta name="keywords" content="Compiler Characteristics (The GNU Fortran Compiler)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<link href="index.html#Top" rel="start" title="Top">
<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="index.html#Top" rel="up" title="Top">
<link href="KIND-Type-Parameters.html#KIND-Type-Parameters" rel="next" title="KIND Type Parameters">
<link href="GFORTRAN_005fUNFORMATTED_005fBUFFER_005fSIZE.html#GFORTRAN_005fUNFORMATTED_005fBUFFER_005fSIZE" rel="prev" title="GFORTRAN_UNFORMATTED_BUFFER_SIZE">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en">
<a name="Compiler-Characteristics"></a>
<div class="header">
<p>
Next: <a href="Extensions.html#Extensions" accesskey="n" rel="next">Extensions</a>, Previous: <a href="Runtime.html#Runtime" accesskey="p" rel="prev">Runtime</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Compiler-Characteristics-1"></a>
<h2 class="chapter">4 Compiler Characteristics</h2>

<p>This chapter describes certain characteristics of the GNU Fortran
compiler, that are not specified by the Fortran standard, but which
might in some way or another become visible to the programmer.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="KIND-Type-Parameters.html#KIND-Type-Parameters" accesskey="1">KIND Type Parameters</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Internal-representation-of-LOGICAL-variables.html#Internal-representation-of-LOGICAL-variables" accesskey="2">Internal representation of LOGICAL variables</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Evaluation-of-logical-expressions.html#Evaluation-of-logical-expressions" accesskey="3">Evaluation of logical expressions</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="MAX-and-MIN-intrinsics-with-REAL-NaN-arguments.html#MAX-and-MIN-intrinsics-with-REAL-NaN-arguments" accesskey="4">MAX and MIN intrinsics with REAL NaN arguments</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Thread_002dsafety-of-the-runtime-library.html#Thread_002dsafety-of-the-runtime-library" accesskey="5">Thread-safety of the runtime library</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Data-consistency-and-durability.html#Data-consistency-and-durability" accesskey="6">Data consistency and durability</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Files-opened-without-an-explicit-ACTION_003d-specifier.html#Files-opened-without-an-explicit-ACTION_003d-specifier" accesskey="7">Files opened without an explicit ACTION= specifier</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="File-operations-on-symbolic-links.html#File-operations-on-symbolic-links" accesskey="8">File operations on symbolic links</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="File-format-of-unformatted-sequential-files.html#File-format-of-unformatted-sequential-files" accesskey="9">File format of unformatted sequential files</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Asynchronous-I_002fO.html#Asynchronous-I_002fO">Asynchronous I/O</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Behavior-on-integer-overflow.html#Behavior-on-integer-overflow">Behavior on integer overflow</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>





</body>
</html>
